A 1.30-m string is held fixed at both ends. When driven by a 140-Hz source, the string vibrates in 4 distinct segments. What is the natural fundamental frequency of the string?
a. 35.0 Hz
b. 70.0 Hz
c. 215 Hz
d. 431 Hz
e. 45.5 Hz
a
Physics & Space Science
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An optical fiber having index of refraction 1.40 is clad with a material of index of refraction 1.25. What is the critical angle for this fiber?
A. 63.2
B. 26.8
C. 41.8
D. 73.0
E. 16.5
Physics & Space Science
A.A B.B C.C D.D E. Toward the viewer F. Away from the viewer T. The field is zero.
Physics & Space Science
An ideal ammeter is one that does not change the behavior of a circuit when it is properly used to measure current. The internal resistance of such a meter is
A) infinite. B) dependent on the circuit. C) 0 ?. D) the same resistance as the circuit. E) cannot be determined
Physics & Space Science
Enforce laws
What will be an ideal response?
Physics & Space Science